Stock tranny

We recently got title to a 65 Chevy truck, with a 400 small block, really a unknown engine but seems to run good,

it looks like it has a stock tranny and a mickey mouse clutch setup on it although it seems to shift fine, ( one side to frame with a 3/8 inch bolt, otherside is bracketed to the engine, covering up the number 5 plug( cant get it out, barely can get wire cap on it).

anyone have picture of a better setup,,we are not restoring this truck but making it usale and reliable,

thanks

Rich